Brake-beam.



no. 690,543.l Patentedlan. 7, |902.

J. H. BAKER.

'- .BRAKE.BEAM.

(Applratiog led July 81, 1901.)` (No Model.) 4 Sheets-Sheet I.

F/ELZ.

I Ma .given-rolf 2. o, mw. ..Y n. a l.. d .nu t n e t .ha P un. E .K A B ....n. L om 4 5., o 9 6 aA N i BRAKE BEAM.

(Application med July 81, 1901.)

.4 Sheets-Sheet 2.

(No Nadel.) v

Att'y.

fe? l y A J: H. BAKER.

, BRAKE BEAM.

(Application filed July 31, 1991A vPatented Ja. 7, i902.

(un Model.; 4 sheets-sheet 3.

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' '.No. 690,548. Patented 1an.'7, |902.

' J. H. BAKER.v

BRAKE BEAM.

(Application lad July 81j, 1901.. (up Manel.; 4 sheets-sheet 4.

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FIBJZ- FIEL/3- UNITED STATES PATENT EEICE.

` .'IAMEs II. BAKER, OE ALLEeHENY, PENNSYLVANIA, 'AssIGNOR To JAs. II. BAKER MANUFACTURING COMPANY, OE PI'rTsRURC., PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BRAKE-BEAM.

SIECIFICATION forming part of Lef-ters Patent No. 690,548, dated January 7, 1902. Application filed July 31,` 1901. Serial No.` 70,380-I (No model.)

To all whom it may Concern.-

Beit known that I, .I AMES H. BAKER, a citi- 'zen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Brake-Beams, of which improvements the following is a specification.

The invention described herein relates to certain improvements in truss brake-beams for cars, and has for its object a construction whereby the several parts thereof may be se-v cured together and placed under the desired strains of tension and compression without injury tol any of the parts. In that class or kind of brake-beams where the compression member is formed by a tube the ends of the tension member are connected to the Compression member generally by passing such ends through holes formed through the compression member at or near its ends, thereby greatly weakening the compression member in the direction of the greatest strains when in use. It has been endeavored to overcome this weakness by employing cast-metal caps or sockets fitting over the compression member and connectedr to the ends of the tension member. As constructed this form is objectionable for the reason that there is no assur- `ance that the inner end walls of the sockets lor caps will be smooth and regular and bear uniformly against the ends of the tubular compression member. Unless such uniformity of bearing is obtained the ends of the compression member become upset by the pull of the tension member against ,the same.

other.

larged scale, of a modiiication of my improvement. Fig. G is a sectional View of the same. Figs. 7, 8, and 9 are plan and longitudinal and vertical sections of further modifica- Fig. l0 is a sectional view showing the brake-shoe head and the anchor for the tension member formed independent of each l y Fig. 1l is a transverse section of the same On a plane indicated by the line XI XI, Fig. 10; and Figs. l2 and 13 are sectional detail views illustrating further modifications.

In the practice of my invention the compression member 1 is preferably formed of a( structural shape, such as'an I-beam, and the shoe-heads 3, which may be of any suitable form of construction,are provided with iianges 4, which are adapted to extend down under the iianges on one side of the structur-` ally-shaped compression member and bear against the web portion 2 of such member. These iianges or wings are drawn together so as to t snugly under the flanges of the compression member a'ud against the web portion by means of one or more rivets 5, which pass through the web of the compression member. As the strainsl to which such members are subjected are in planes parallel with the web, the rivet-holes are in or approximately in the neutral line of such strains and do not, therefore, weaken the member. As is customary, the shoe-heads are provided on their rear faces with ribs or flanges 6, which serve to strengthen and reinforce the same, and it has been customary heretofore to employ one of these anges as a stop to prevent the inward movement of the heads on the compression member. I prefer, however, to forman auX- iliary shoulder 7 inside of these iianges, which shall serve as a stop or bearingv fonthe ends of the compression member.

IOC

In order to attach the ends of the tension member 16 to the compression member, anchor-pieces exterior of the shoe-heads are preferably employed, such anchor-pieces consisting of shoulders 8 to form bearings for shoulders 9 of the tension member and the web portion or lianges 10, which extend partly around the compression member and are caused to fit thereon by means of one or more rivets 11, which serve to hold the anchorpieces and the ends of the tension members in engagement. These anchor-pieces are secured to the compression member by means of.rivets passing through the flanges 10 of the anchor-pieces and the wall of the compression member. It is preferred to form these anchor-pieces as lateral extensions of and integral with the brake-shoe heads, but independent of each other, as clearly shown in Figs. 1 to 9, inclusive; but such anchorpieces may, if desired, be formed also independent of the shoe-heads and riveted to the compression member, as shown in Figs. 10 and 11. For some reasons this latter construction is preferable as permitting of the removal of the brake-shoe heads without loosening the tension member or destroying its connection with the compression member. In the construction shown in Figs. 1, 2, and

` 3 the shoulders of the tension member are held in position behind the shoulders of the anchor-pieces by means of a rivet passing above the ends of the tension member and through ianges 13 on the anchor-pieces in the rear of the shoulders 9. In this construction the tension member is not weakened by the formation of the rivet-holes therethrough. As shown in Figs. 5 and 6, the anchorpieces are formed of two parts or members independent of each other, but both integral with the shoe-head, so that by the heading up of the holding-rivet 11, which passes through the anchor-pieces and the tension member in the rear of its shoulders, these two parts of the anchor-pieces are drawn tightly together against the sides of the tension-and compression members. It is preferred that the bearing-faces of the shoulders 8 and 9 on the anchor-pieces and tension member, respectively, should be so inclined or beveled that the tension pull of the tension member will tend to draw the parts of the anchor-pieces in against the tension and compression members.

As clearly shown, my improvement can be applied to truss-beams having the compression member formed of tubes, as shown in Figs. 7, 8, and 9, the flanges 4; on the brakeshoe heads 3 and anchor-pieces being curved to correspond to the curved surfaces of the tubes. It will be observed that these webs or anges on the head and anchor pieces do not extend entirely around the compression member and can therefore be made to Iit the same accurately.

Considerable difculty is at times experienced in separating the parts of the beam when it is desired to renew parts of the same,

such difficulty being caused by the tension or pull of the tension member on the anchors, whereby the ends of such members are secured to the compression member. In order to render the separation of these parts easy without slacking up the strut of the truss, I provide removable blocks or sections as bearing-pieces 15 between the ends of the compression member and the brake-shoe heads, as shown in Figs. 12 and 13. These removable bearing pieces are lightly riveted in place, the rivets being preferably formed integral with the bearing-pieces, and when it is desired to repair a beam these rivets are cut and the bearing-pieces pried out of position, thereby allowing the heads to move inward and relieve the tension of the tension member. When new heads have been placed in position, the parts can be brought back to the original tension by driving new bearingpieces into position between the ends of the compression member and the shoulders on the new head and riveting the bearing-pieces in position.

It will be readily understood by those skilled in the art that as the ilanges on the heads and anchor-pieces do not extend entirely around the compression member in the form of a sleeve they can be drawn against and caused to lit the compression member snugly by the attaching-rivets.

I claim herein as my invention:-

1, A brake-beam having in combination, a compression member, a tension member, brake-shoe heads secured directly to the compression member, and independent anchor; pieces secured to the compression member at or adjacent to both ends thereof and inside the brake-shoe heads and adapted to be secured to the tension member, substantially as set forth.

2. A brake-beam having in combination a compression member, a tension member, a strut and brake-shoe heads secured to the' compression member and anchor-pieces inde'-l pendent of the brake-shoe heads secured to the compression and tension members and capable of removal from the compression member independent of the brake-shoe heads, substantially as set forth.

3. A brake-beam having in combination a compression member, a tension member, a strut, a brake-shoe head secured to the compression member, independent anchor-pieces adapted to be secured directly to the compression and tension members, substantially as set forth.

4. A brake-beam having in combination a compression member, a tension member, a strut, a brake-shoe head secured to the compression member, independent anchor-pieces provided with shoulders adapted to engageV shoulders in the tension member, and means for drawing the anchor pieces inwardly against the compression and tension members, substantially as set forth. y

5. A brake-beam having in combination a compression member, a V tension member, a strut, a brake-shoe head carried by the compression member and connected to the tencompression member, atension member provided with inclined shoulders,a strut,a brakeshoe head carried by the compression member, anchor pieces provided with inclined shoulders adapted to engage the shoulders inthe tensionv member whereby lthe anchorpieces are drawn inwardly toward the tension and compression members, substantially as set forth.

In testimony whereof I have hereunto set my hand.

JAMES H. BAKER Witnesses i v DARWI'N S. WoLoo'rT',

F. E. GAITHER. 

